Mega Lopunny ex does come with its advantages, though
The best I could come up with for locking opponents out of a Commander game with Glorious End requires getting a Glorious End exiled with Elite Arcanist along with a Paradox Engine on the battlefield
Carrion Feeder being a Zombie can also come into play when looking to bring back Gravecrawlers in some sort of Bridge from Below / Vengevine deck
As it stands, MTG Final Fantasy spoilers show a PSX-era Yuffie as Yuriko, The Tiger's Shadow and Dragon of Mount Gulg as Ancient Copper Dragon
However, shes likely going to be included in Amber decks mostly for Shifting into the Floodborn Ursula capable of discarding cards
Doubling your mill makes mill spells that much more effective, and its especially necessary in Commander, where the deck size and opponent count jump dramatically